Steam-explosion-modified optimization of soluble dietary fiber extraction from apple pomace using response surface methodology
文献类型: 外文期刊
第一作者: Liang, Xinhong
作者: Liang, Xinhong;Ran, Junjian;Sun, Junliang;Wang, Tianlin;He, Hongju;Zhu, Mingming;Jiao, Zhonggao
作者机构:
关键词: Apple pomace; steam explosion; response surface; soluble dietary fiber
期刊名称:CYTA-JOURNAL OF FOOD ( 影响因子:2.255; 五年影响因子:2.381 )
ISSN: 1947-6337
年卷期: 2018 年 16 卷 1 期
页码:
收录情况: SCI
摘要: To make full use of apple pomace, pretreatment with steam explosion (SE) was investigated to determine its effects on the yield and functionality of soluble dietary fiber (SDF). Response surface methodology (RSM) was used to optimize the effects of SE parameters. According to the quadratic polynomial model, the optimum SE parameters were as follows: steam pressure, 0.51 MPa; residence time, 168s; and sieving mesh size, 60. Under the optimized conditions, the SDF yield from apple pomace after SE was 29.85%, which is 4.76 times the yield of SDF (6.27%) in untreated apple pomace. The SDF prepared with SE also exhibited higher functionality values. Scanning electron micrographs (SEM) indicated that the SDF surface from apple pomace was poriferous, rough and lax after SE treatment; therefore, it can be concluded that the SDF morphology was altered by the steam explosion. RESUMENCon el fin de aprovechar plenamente la pulpa de manzana, se investigaron los efectos que su tratamiento previo con explosion de vapor (EV) tiene sobre el rendimiento y la funcionalidad de la fibra dietetica soluble (FDS). Asimismo, a fin de optimizar los efectos de los parametros de la EV, se uso la metodologia de superficies de respuesta (MSR). El modelo del polinomio cuadratico permitio establecer los parametros optimos de la EV: presion del vapor, 0,51 MPa; tiempo de residencia, 168 s; y medida de la malla de criba, 60. Bajo estas condiciones optimas, el rendimiento de la FDS extraida de la pulpa de manzana tras ser sometida a la EV fue de 29,85%, es decir, 4,76 veces superior al rendimiento de la FDS extraida de la pulpa de manzana sin tratar (6,27%). Por otra parte, la FDS tratada con EV tambien presento valores de funcionalidad mas elevados. La micrografia por barrido electronico (MBE) indico que, tras el tratamiento con EV, la superficie de la FDS extraida de la pulpa de manzana era porosa, aspera y laxa, lo que permite concluir que la morfologia de la FDS fue alterada por el tratamiento con explosion de vapor.
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